“sound pressure level”的概念、定义、翻译、参考文献-科学参考

单词	sound pressure level
释义	sound pressure level Electronics and Electrical Engineering The root-mean-square (r.m.s.) pressure of a sound wave at a particular instant (P_actual), usually expressed in decibels (dBSPL) with respect to the average threshold of hearing at 1 kilohertz (P_ref) of 20 micropascal: $dBSPL = 20 {log}_{10} (\frac{P_{actual}}{P_{ref}})$
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